AI Engineer
LiteLLMLiteLLM

AI Engineer

LiteLLM provides an open source Python SDK and Python FastAPI Server that allows calling 100+ LLM APIs (Bedrock, Azure, OpenAI, VertexAI, Cohere, Anthropic) in the OpenAI format.

As the Backend LLM Engineer, you'll be responsible for ensuring LiteLLM unifies the format for calling LLM APIs in the broader OpenAI + Anthropic spec. This involves writing transformations to convert API requests from OpenAI/Anthropic spec to various LLM provider formats, building provider-agnostic unification functionality (e.g. session management across non-openai models for /v1/responses API, etc.). You'll work directly with the CEO and CTO on critical projects including:

  • System design for supporting provider level features at the gateway level (skills, compaction, batches, etc.)

  • Thinking about the developer experience - to support millions of users who leverage your work via LiteLLM's Python SDK

  • Building across LLM's, MCP's, and Agents by maintaining an excellent LLM interoperability layer, supporting a wide range of MCP Auth flows and enabling various Agent use-cases

What is our tech stack

The tech stack includes Python, FastAPI, Redis, Postgres.

Who we are looking for

  • 1-2 years of backend/full-stack experience with production systems
  • Passion for open source and user engagement
  • Experience working with the OpenAI api (understand the difference between /chat/completions and /responses, and can speak to API-specific nuances)
  • Strong work ethic and ability to thrive in small teams
  • Eagerness to talk to users and help solve real problems

About the interview

Our interview process is:

  • Intro call - 30 min

    Behavioral discussion about your working style, expectations, and the company’s direction.

  • Hackerrank - 1 hr

    A hackerrank covering basic python questions

  • Virtual Onsite - 3 hrs

    Virtual onsite with founders, which involves solving an issue on LiteLLM’s github together, a presentation of a technical project and a system design question

About LiteLLM

LiteLLM (https://github.com/BerriAI/litellm) is a Python SDK, Proxy Server (LLM Gateway) to call 100+ LLM APIs in OpenAI format - [Bedrock, Azure, OpenAI, VertexAI, Cohere] and is used by companies like Rocket Money, Adobe, Twilio, and Siemens.